Rotten egg gas, hydrogen sulfide, H2S, can be destroyed by reacting it with oxygen according to this equation. 2H2S(g) +3O2(g) 2SO2(g) + 2H2O(g) How many moles of sulfur dioxide will be formed and how many moles of which reactant will be left over after reacting: 3 mol H2S with 4 mol O2?​